CN110037422B - Potentiometer linkage adjusting mechanism and blower - Google Patents

Abstract

The present invention discloses a potentiometer linkage adjustment mechanism and a hair dryer, which belong to the field of household appliance technology and are designed to solve the problem that the existing rotary potentiometer is difficult to be directly applied to a hair dryer. The potentiometer linkage adjustment mechanism of the present invention includes a rotary potentiometer and also includes a trigger for driving and adjusting the angle of the rotary potentiometer. The potentiometer gear of the rotary potentiometer is meshed with the trigger gear of the trigger, and the angular velocity of the trigger gear is less than the angular velocity of the potentiometer gear. The potentiometer linkage adjustment mechanism of the present invention and the hair dryer trigger can drive the rotary potentiometer to rotate to a larger angle by rotating a smaller angle, thereby realizing large-angle adjustment of the rotary potentiometer within a small space. The utilization rate of the potentiometer gear is higher, and there can be more gears, so that the hair dryer can have more working modes or functions and a wider range of applications.

Description

Potentiometer linkage adjustment mechanism and hair dryer

Technical Field

The present invention relates to the technical field of household appliances, and in particular to a potentiometer linkage adjustment mechanism and a hair dryer comprising the potentiometer linkage adjustment mechanism.

Background technique

A hair dryer is a household appliance that uses hot air to dry wet hair and other objects. When the object to be dried is different, it may be necessary to adjust the motor speed or air outlet mode through a potentiometer.

Existing hair dryers basically use plunger potentiometers, but plunger potentiometers are inferior to rotary potentiometers in terms of stability and sealing. However, the existing rotary potentiometers require a large installation space and operation space, and the rotary potentiometer can only rotate at a small angle in the limited installation space provided by household hair dryers, with low utilization and few gears that can be achieved by the rotary potentiometer.

Summary of the invention

An object of the present invention is to provide a potentiometer linkage adjustment mechanism capable of adjusting a rotary potentiometer at a large angle within a small space.

Another object of the present invention is to provide a hair dryer with more stable working performance and more convenient adjustment.

To achieve this object, on the one hand, the present invention adopts the following technical solutions:

A potentiometer linkage adjustment mechanism comprises a rotary potentiometer and a trigger for driving and adjusting the angle of the rotary potentiometer. The potentiometer gear of the rotary potentiometer is meshed with a trigger gear of the trigger, and the angular velocity of the trigger gear is less than the angular velocity of the potentiometer gear.

In particular, the potentiometer linkage adjustment mechanism further comprises a base for mounting the rotary potentiometer, and an assembly foolproof mechanism is arranged on the base, the rotary potentiometer and/or the trigger.

In particular, the assembly anti-fool mechanism positioning protrusion and stopper, wherein a positioning protrusion is provided on one of the rotary potentiometer and the base, and a stopper is provided on the other, and when the rotary potentiometer rotates to a set position, the positioning protrusion abuts against the stopper.

In particular, the trigger is a strip-shaped structure, and the trigger mounting hole is located in the middle of the trigger; the trigger gear composed of a plurality of connected gear teeth is processed at one end of the trigger, and the side of part of the trigger gear is blocked by the assembly anti-misalignment mechanism to prevent the trigger gear and the potentiometer gear from being misaligned during installation.

In particular, the assembly foolproofing mechanism is a flat plate, which is arranged on the side surface of the trigger end that first contacts the rotary potentiometer when installed.

In particular, the outer end of the flat plate is a first arcuate surface, and the line connecting the first arcuate surface and the tooth top surface of the trigger gear that is completely blocked is located in the same curved surface.

In particular, a limit plate for shielding a portion of the side surface of the potentiometer gear is provided on the rotary potentiometer, and the limit plate is located on the side surface that first contacts the trigger during installation.

In particular, the outer end of the limiting plate is a second arc surface, and the second arc surface and the connecting line of the tooth top surface of the potentiometer gear that is completely blocked are located in the same curved surface.

In particular, the transmission ratio between the trigger gear and the potentiometer gear is 1:3.

On the other hand, the present invention adopts the following technical solutions:

A hair dryer comprises a shell and a handle, and also comprises the above-mentioned potentiometer linkage adjustment mechanism, wherein the rotary potentiometer of the potentiometer linkage adjustment mechanism is installed in the shell or in the handle.

The potentiometer gear of the potentiometer linkage adjustment mechanism of the present invention is meshed with the trigger gear, and the angular velocity of the trigger gear is less than the angular velocity of the potentiometer gear. The trigger can drive the rotary potentiometer to rotate a larger angle by rotating a smaller angle, thereby realizing large-angle adjustment of the rotary potentiometer within a small space. The utilization rate of the potentiometer gear is higher, and more gears can be provided, so that the hair dryer can have more working modes or functions and a wider range of applications.

The hair dryer of the present invention includes the above-mentioned potentiometer linkage adjustment mechanism, which can adjust the rotary potentiometer at a large angle in a small space, the utilization rate of the potentiometer gear is higher, and more gears can be provided, thereby solving the technical problem that the existing rotary potentiometer is difficult to be directly used in a hair dryer.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a potentiometer linkage adjustment mechanism provided in a specific embodiment of the present invention;

FIG2 is a schematic diagram of another angle structure of the potentiometer linkage adjustment mechanism shown in FIG1;

FIG3 is a schematic structural diagram of a rotary potentiometer in the potentiometer linkage adjustment mechanism shown in FIG1 ;

FIG4 is a schematic structural diagram of a base in the potentiometer linkage adjustment mechanism shown in FIG1 ;

FIG. 5 is a schematic structural diagram of a trigger in the potentiometer linkage adjustment mechanism shown in FIG. 1 .

In the figure:

1. Rotary potentiometer; 2. Trigger; 3. Base; 11. Potentiometer gear; 12. Potentiometer mounting hole; 13. Positioning bump; 14. Limit plate; 21. Trigger gear; 22. Trigger mounting hole; 23. Flat plate; 31. Stop block.

Detailed ways

The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

The present embodiment discloses a potentiometer linkage adjustment mechanism and a hair dryer, the hair dryer comprising a housing, a handle and a potentiometer linkage adjustment mechanism. As shown in FIGS. 1 to 5 , the potentiometer linkage adjustment mechanism comprises a rotary potentiometer 1, a trigger 2 for driving and adjusting the angle of the rotary potentiometer 1, and a base 3 for mounting the rotary potentiometer 1, the rotary potentiometer 1 is mounted in the housing or in the handle, the trigger 2 is at least partially disposed outside the housing or the handle (for example, a small bump at the end of the trigger 2 is disposed outside the housing or the handle) to facilitate the user to dial.

The trigger 2 is a strip-shaped structure, and the trigger mounting hole 22 for passing the trigger shaft is located at the approximate middle position of the trigger 2. A trigger gear 21 composed of a plurality of connected gear teeth is formed at one end of the trigger 2. A potentiometer gear 11 is arranged on the outer peripheral surface of the rotary potentiometer 1. The potentiometer gear 11 of the rotary potentiometer 1 is meshed with the trigger gear 21 of the trigger 2, and the rotation radius of the trigger gear 21 is greater than the rotation radius of the potentiometer gear 11, that is, the distance A is between the trigger gear 21 and the trigger mounting hole 22, and the distance B is between the potentiometer gear 11 and the potentiometer mounting hole 12 on the rotary potentiometer 1 for passing the potentiometer shaft, and the distance A>the distance B. Therefore, during the adjustment process, the angular velocity of the trigger gear 21 is less than the angular velocity of the potentiometer gear 11. Preferably, the transmission ratio of the trigger gear 21 to the potentiometer gear 11 is 1:3.

The trigger gear 21 is meshed with the potentiometer gear 11, and the angular velocity of the trigger gear 21 is less than the angular velocity of the potentiometer gear 11, so that the trigger 2 can drive the rotary potentiometer 1 to rotate a larger angle by rotating a smaller angle, thereby realizing a large angle adjustment of the rotary potentiometer 1 within a small space. In the potentiometer linkage adjustment mechanism of this embodiment, the rotation angle of the trigger 3 is ≤45°, and the adjustment angle of the rotary potentiometer 1 is ≥60°, the utilization rate of the potentiometer gear 11 is higher, and more gears can be provided, so that the hair dryer can have more working modes or functions and a wider range of applications.

The space for installing the potentiometer linkage adjustment mechanism in the hair dryer is relatively small. If the rotary potentiometer 1, the trigger 2 and the base 3 are all installed and matched before being installed in the hair dryer as a whole, it is difficult; if the rotary potentiometer 1 and the base 3 are first installed in the hair dryer and then the trigger 2 is installed, the installation difficulty will be greatly reduced. Specifically, after the rotary potentiometer 1 and the base 3 are installed, the trigger shaft is installed in place, and then the trigger installation hole 22 is mounted on the trigger shaft, and the trigger 2 is pressed downward until the trigger gear 21 is meshed with the potentiometer gear 11.

During the actual installation process, the operator may misalign the trigger gear 21 and the potentiometer gear 11 due to misalignment when pressing the trigger 2, that is, one or more teeth located at the edge of the trigger gear 21 and the potentiometer gear 11 cannot be used, thereby reducing the utilization rate of the potentiometer gear 11.

In order to solve the problem of misalignment between the trigger gear 21 and the potentiometer gear 11 (or called foolproofing), a foolproofing mechanism can be provided. Exemplarily, the foolproofing mechanism can be a positioning protrusion 13 provided on the rotary potentiometer 1, and a stopper 31 provided on the base 3, and when the rotary potentiometer 1 rotates to the set position, the positioning protrusion 13 abuts against the stopper 31.

The foolproof mechanism may also be a plate 23 that covers part of the trigger gear 21 and a limit plate 14 that covers part of the potentiometer gear 11. Once misalignment occurs during installation, the trigger gear 21 cannot be smoothly engaged with the potentiometer gear 11, thereby reminding the operator that the installation is incorrect.

Specifically, the flat plate 23 is arranged on the side surface that first contacts the rotary potentiometer 1 when the trigger 2 is installed, and the first arc surface at the outer end of the flat plate 23 and the line connecting the top surfaces of the teeth of the trigger gear 21 that are completely blocked are located in the same curved surface; the limit plate 14 is located on the side surface that first contacts the trigger 2 when installed, and the second arc surface at the outer end of the limit plate 14 and the line connecting the top surfaces of the teeth of the potentiometer gear 11 that are completely blocked are located in the same curved surface. The assembly foolproof mechanism and the stopper 31 are respectively located on both sides of the potentiometer mounting hole 12.

The fool-proofing mechanism can be arranged only on the base 3 and the rotary potentiometer 1, or only on the rotary potentiometer 1 and the trigger 2. It is also possible to simultaneously arrange one set of fool-proofing mechanisms between the base 3 and the rotary potentiometer 1 and another set of fool-proofing mechanisms between the rotary potentiometer 1 and the trigger 2.

Of course, other foolproof mechanisms are also possible. For example, a protrusion is provided on one of the rotary potentiometer 1 and the base 3, and a groove is provided on the other, which can also play a role in accurately determining the assembly position and avoiding assembly misalignment.

During installation, first rotate the rotary potentiometer 1 to the position where the positioning protrusion 13 and the stopper 31 are in contact, and then press the trigger 2 from top to bottom; the blocked gears on the rotary potentiometer 1 and the trigger 2 cannot be installed, so the operator only needs to align the edges of the flat plate 23 and the limit plate 14 to accurately install the trigger 2.

When in use, the flat plate 23 is located on the bottom surface of the trigger 2, and the limit plate 14 is located on the top surface of the rotary potentiometer 1. The two do not interfere with each other, and neither affects the meshing of the trigger gear 21 with all the gears on the potentiometer gear 11, thereby improving the utilization rate of the potentiometer gear 11.

Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (7)

1. A potentiometer linkage adjustment mechanism, comprising a rotary potentiometer (1), characterized in that it also comprises a trigger (2) for driving and adjusting the angle of the rotary potentiometer (1), wherein a potentiometer gear (11) of the rotary potentiometer (1) is meshed with a trigger gear (21) of the trigger (2), and an angular velocity of the trigger gear (21) is less than an angular velocity of the potentiometer gear (11); The trigger (2) is a strip-shaped structure, and the trigger mounting hole (22) is located in the middle of the trigger (2); the trigger gear (21) composed of a plurality of connected gear teeth is formed at one end of the trigger (2); The potentiometer linkage adjustment mechanism further comprises a base (3) for mounting the rotary potentiometer (1), a set of assembly foolproofing mechanisms being arranged between the base (3) and the rotary potentiometer (1), and a set of assembly foolproofing mechanisms being arranged between the rotary potentiometer (1) and the trigger (2); A set of assembly foolproof mechanisms arranged between the base (3) and the rotary potentiometer (1) comprises a positioning protrusion (13) and a stopper (31); A set of assembly foolproof mechanisms arranged between the rotary potentiometer (1) and the trigger (2) comprises a flat plate (23), the flat plate (23) being arranged on the end of the trigger (2) and on the side surface which first contacts the rotary potentiometer (1) during installation; a part of the side surface of the trigger gear (21) is blocked by the flat plate (23) to prevent the trigger gear (21) from being misaligned with the potentiometer gear (11) during installation. 2. The potentiometer linkage adjustment mechanism according to claim 1, characterized in that the positioning protrusion (13) is provided on one of the rotary potentiometer (1) and the base (3), and the stopper (31) is provided on the other, and when the rotary potentiometer (1) rotates to a set position, the positioning protrusion (13) abuts against the stopper (31). 3. The potentiometer linkage adjustment mechanism according to claim 1, characterized in that the outer end of the flat plate (23) is a first arcuate surface, and the line connecting the first arcuate surface and the tooth top surface of the completely blocked trigger gear (21) is located in the same curved surface. 4. The potentiometer linkage adjustment mechanism according to claim 1, characterized in that a limit plate (14) is provided on the rotary potentiometer (1) for shielding a portion of the side surface of the potentiometer gear (11), and the limit plate (14) is located on the side surface that first contacts the trigger (2) during installation. 5. The potentiometer linkage adjustment mechanism according to claim 4, characterized in that the outer end of the limit plate (14) is a second arc surface, and the second arc surface and the line connecting the tooth top surface of the entire blocked potentiometer gear (11) are located in the same curved surface. 6. The potentiometer linkage adjustment mechanism according to any one of claims 1 to 5, characterized in that the transmission ratio between the trigger gear (21) and the potentiometer gear (11) is 1:3. 7. A hair dryer, comprising a housing and a handle, characterized in that it also comprises a potentiometer linkage adjustment mechanism as claimed in any one of claims 1 to 6, wherein the rotary potentiometer (1) of the potentiometer linkage adjustment mechanism is installed in the housing or in the handle.